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Preparation method of high temperature speckle based on dic welding dynamic strain test

A dynamic strain and speckle technology, applied in the fields of mechanics and optical testing, can solve the problems of large influence, difficult to guarantee speckle quality, easy speckle fall off, etc., to achieve easy control of density, easy control of speckle quality, and low cost. Effect

Active Publication Date: 2018-03-13
SHANGHAI JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The speckles prepared by this method are relatively easy to fall off, and are greatly affected by the external environment during use, which will be subject to certain restrictions in practical applications.
[0005] To sum up, among the existing high-temperature-resistant speckle preparation methods, some methods are complicated to operate, some methods are difficult to guarantee the speckle quality, and some methods are greatly affected by the external environment. Preparation method of high temperature resistant speckle with easy quality control and less influence by external environment during use

Method used

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  • Preparation method of high temperature speckle based on dic welding dynamic strain test
  • Preparation method of high temperature speckle based on dic welding dynamic strain test
  • Preparation method of high temperature speckle based on dic welding dynamic strain test

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preparation example Construction

[0025] The high-temperature speckle preparation method based on DIC welding dynamic strain test adopts the following steps:

[0026] 1. Cut the base material into the desired shape, perform grinding and polishing treatment, use absolute ethanol to clean the surface of the base material, and dry;

[0027] 2. Prepare watch glasses, glass rods, small flat spatulas, medicine spoons, two-component aluminosilicate materials, and white high-temperature-resistant powder materials;

[0028] 3. In a watch glass, according to the solid-liquid ratio of 0.5 ~ 1.0g: 1mL, prepare the two-component aluminosilicate material into a paste-like high-temperature-resistant glue;

[0029] 4. Use a small flat shovel to take an appropriate amount of high-temperature-resistant glue and place it on the surface of the base material, and use a small flat shovel to evenly coat the high-temperature glue into a thin layer with a thickness of 0.1-0.2mm;

[0030] 5. Use a medicine spoon to take an appropriate...

Embodiment 1

[0035] The base material is aluminum alloy with a size of 75mm×25mm×1.5mm. The process of preparing high temperature resistant speckle on the aluminum alloy surface is as follows:

[0036] 1. Take two pieces of the aluminum alloy, use absolute ethanol to clean the surface of the aluminum alloy, and dry;

[0037] 2. Prepare watch glass, glass rod, small flat spatula, medicine spoon, two-component aluminosilicate material, neutral alumina (100-200 mesh), neutral alumina (200-300 mesh);

[0038] 3. In a watch glass, according to the solid-liquid ratio of 0.7g:1mL, prepare the two-component aluminosilicate material into a paste-like high-temperature-resistant glue;

[0039] 4. Use a small flat shovel to take an appropriate amount of high-temperature-resistant glue and place them on the surfaces of two aluminum alloys, and use a small flat shovel to evenly coat the high-temperature glue into a thin layer with a thickness of 0.1-0.2mm;

[0040] 5. Use a medicine spoon to take an ap...

Embodiment 2

[0044] The base material is a copper plate with a size of 50mm×50mm×2.0mm. The specific steps for preparing high-temperature-resistant speckles on the surface of the copper plate are as follows:

[0045] 1. Take three pieces of the copper plate, grind and polish them, use absolute ethanol to clean the surface of the copper plate, and dry;

[0046]2. Prepare watch glass, glass rod, small flat spatula, medicine spoon, two-component aluminosilicate material, neutral alumina (200-300 mesh);

[0047] 3. In a watch glass, according to the solid-liquid ratio of 0.7g: 1mL, prepare the two-component aluminosilicate material into a paste-like high-temperature-resistant glue;

[0048] 4. Use a small flat shovel to take an appropriate amount of high-temperature-resistant glue and place them on the surfaces of the three copper plates, and use a small flat shovel to evenly coat the high-temperature glue into a thin layer with a thickness of 0.1-0.2mm;

[0049] 5. Use a medicine spoon to ta...

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Abstract

The invention relates to a method for preparing high-temperature speckle based on DIC welding dynamic strain test, and the two-component aluminosilicate material is made into a paste-like high-temperature-resistant adhesive; it is evenly coated on the surface of the base material that has been polished and cleaned with ethanol High temperature resistant glue, and then sprinkle a layer of evenly distributed high temperature resistant particles on the high temperature resistant glue to trim the surface of the base material; make the high temperature resistant glue cure, that is to prepare high temperature resistant speckles on the surface of the base material. Compared with the existing technology, the speckle obtained by the present invention can withstand the temperature of about 800°C, and is especially suitable for the digital image correlation method measurement of welding dynamic strain, and can also be used for mechanical properties of materials under high temperature conditions such as stretching and fracture damage. Performance measurement. The invention has novel ideas, simple operation and low preparation cost, and has broad application prospects in high-temperature optical measurement of mechanical properties.

Description

technical field [0001] The invention relates to the technical fields of optical testing and mechanics, in particular to a high-temperature speckle preparation method based on DIC welding dynamic strain testing. Background technique [0002] In recent years, the characterization of the mechanical behavior of materials in high temperature environments has become a matter of great concern in the fields of material processing, experimental solid mechanics and materials science, especially the measurement of dynamic stress and strain of materials during welding. Real-time measurement of the mechanical behavior of materials in high-temperature environments is of great significance to the evolution of material properties, reliability assessment, and life prediction. Because traditional contact methods are affected by temperature, it is difficult to effectively measure the displacement of materials or structural surfaces in high-temperature environments, so non-contact methods play ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N1/28
Inventor 徐济进林烈雄陆皓余春陈俊梅陈捷狮
Owner SHANGHAI JIAOTONG UNIV